One major disadvantage to the ULA's filter is that it's not field cleanable.
Funny, I've cleaned this filter in the field three times, two of them just for practice.
I haven't really timed the filtering speed of the ULA Amigo Pro and I really don't care, because while it's filtering I'm doing something else, like resting or cooking or admiring the scenery or some such. I don't go out backpacking to indulge in speed; there's too much of that going on in "civilization." I'm more interested in weight, price and effectiveness. If I want speed, I'll get a Steripen or return to using a pump filter.